Hey, I am in Wilmington, NC only a few miles away. What is it you are trying to kill off?

Actually I've already done it. I worked at a golf course for a couple years and we would spray barricade and roundup in the rough (bermuda) starting in mid February. I recently spot sprayed an entire property of centipede with Prosecutor 3oz./Gal. Now I'm reading online that its not safe to spray glyphosate on dormant centipede, st Augustine, or zoysia. Weeds were mainly cudweed, tall fescue, poa, and henbit.

Now I'm worried I will have a bunch of dead grass come spring time.Posted via Mobile Device

Gly kills to the roots,,, but I thought it only gets to the roots systemically through the actively growing leaves... When the leaves are dormant and brown there is no longer any translocation from the above ground material to the below ground material...

Plz let us know how your spraying worked out... If it killed the weeds and If it harmed the lawn grass in any way...
This question has been kicked around for years now and nobody seems to have any anecdotal info about it... the Official Info. is strictly CYA...

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Now that I know that clay's texture(platelets) has nothing to do with water infiltration, percolation, or drainage,,, I wonder what does...
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Weed Control
Apply preemergence herbicides to control crabgrass, goosegrass, and foxtail. Apply by the time that dogwoods are in full bloom. Apply postemergence herbicides in May as needed for control of summer annual and perennial broadleaf weeds such as knotweed, spurge, lespedeza, etc. Do not apply until 3 weeks after greenup. Centipedegrass is sensitive to certain herbicides (e.g. 2,4-D), so follow label directions and use with caution. VIA Turf Files at NC state.

__________________You can shear a lamb many times, but you can skin him only once!

Centipedegrass is pretty finicky. It is sensitive to different herbicides and sensitive to too much herbicide (think overlaps, etc). It is also sensitive to winter kill and doesn't go fully dormant in most of the US, so I don't like to treat it with anything while it's not fully green. I've even seen half rates of herbicides labeled specifically for centipedegrass do damage when applied when the lawn is off-color. My best advice would be to use this as an opportunity to get the customer to switch to a better turf species.

As for glyphosate, it has no root uptake. It is taken up through translaminar activity, then translocated throughout the plant. I can't stand the misnomer about "kills to the roots." Either it kills or it doesn't. Glyphosate interrupts the shikimic acid pathway, which allows the plant to make different armoatic acids, specifically tyrosine, tryptophan, and phenylalanine.